8-32 Stainless Steel Phillips Truss Head Machine Screws 18-8 Stainless Steel Includes 303 & 304 Grades #8-32 Right Hand Thread, UNC Fully Threaded For Use With A Pre Tapped Hole Or Matching Hex Nut. Rust and Corrosion Resistant Truss Head Machine Screws Have a Lower Profile Dome Then Pan Heads. They also Have Wider Surface Area. Standards: ANSI B18.6.3 Please View Matching Nuts & Washers Below.